Evaluation of different airway tests to determine difficult intubation in apparently normal adult patients undergoing surgical procedures

Table 5 Validity of airway assessment test combinations in predicting difficult intubations

	Accuracy %	Sensitivity %	Specificity %	PPV %	NPV %	Youden’s index
MMT-TP + MMT-NTP	80.31	50	83.44	23.81	94.16	0.33
MMT-TP + TMD	84.69	43.33	88.96	28.89	93.82	0.32
MMT-TP + SMD	82.5	46.67	86.21	25.92	93.98	0.33
MMT-TP + MPT	87.5	43.33	92.07	36.11	94.01	0.35
MMT-NTP + TMD	80.62	53.33	83.45	25	94.53	0.37
MMT-NTP + SMD	78.43	56.67	80.69	23.29	94.74	0.37
MPT + MMT-NTP	83.44	53.33	86.55	29.09	94.72	0.4
MPT + SMD	85.63	50	89.31	32.61	94.53	0.39
MPT + TMD	87.81	46.67	92.061	37.84	94.35	0.39
TMD + SMD	82.3	46.87	86.21	27.27	93.63	0.33

MMT-TP modified Mallampati test with tongue protrusionm, MMT – NTP modified Mallampati test without tongue protrusion, MPT mandibular protrusion test, TMD thyromental distance, SMD sternomental distance, PPV positive predictive value, NPV negative predictive value

ISSN: 1754-9493